On Saturday 10 August 2013, Bob Smith wrote: > GOAL > The goal of this patch was to make it possible to configure > daemons using simple file IO. The litmus test for this is > that commands like these should be possible > cat < /var/daemons/wpa_supplicant/use_channel > echo 5 >/var/daemons/wpa_supplicant/use_channel > > Yes, there are many other ways to configure a daemon but > none with the simplicity and grace of file IO. For proof > of this I point to procfs and sysfs.
I'll try to keep out of the discussion about whether or not another IPC mechanism with your desired semantics would be good to have in the kernel, but one comment about implementing it: If you want to have that behavior, I think the best way to do it would be new file system that combines aspects of tmpfs and debugfs, letting users with write access to the mount point (or a directory under it) create subdirectories and files using regular unix permission handling. You would then always use the file_operations that you defined for your chardev but use that with inode_operations similar to tmpfs. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/